v0.1.0-rc.1

First tagged release candidate of the v0.1 line, after one complete brownfield
pilot adoption (archaeology → §4.3 human review → recorded outcomes → scoped
remediations).

Adopter impact / upgrade actions

• Adopters pinned to unreleased commits upgrade in one reviewed change
  (ADOPTION.md §2.1): upstream.version → v0.1.0-rc.1,
  upstream.commit → b18eeef92538a1fe7ad8e7ec883a84aa0a4742db, and the CI
  caller workflow @ reference → the same SHA.
• All schema changes are backward-compatible additions.
• Pinning version: unreleased remains valid only for commits whose VERSION
  file reads unreleased (PROFILE.md §16).

Full changelog: CHANGELOG.md